A Robust Speed and Torque Control of DC Motor with Cuk Converter Using PI and SMC
DOI:
https://doi.org/10.18196/jrc.v6i3.25756Keywords:
DC Motor Control, Speed Control, Torque Control, Nonlinear Control Techniques, PI Controller, Sliding Mode Control (SMC), Cuk Converter-Fed DC Motor, Matlab/SimulinkAbstract
Robust speed and torque control of a DC motor powered by a DC/DC converter has become widespread attention recently. This research examines the Cuk converter's effectiveness in powering the DC motor using proportional-integral (PI) and sliding mode control (SMC) under three operating scenarios: variable speed (1600-500 rpm) and constant torque (20 N.m), constant speed(600 rpm) and variable torque (20-40 N.m), and variable speed (500-100 rpm) and variable torque (20-40 N.m). The research aims to provide accurate motor speed and torque control to enhance motor operations. PI and SMC controllers were constructed to investigate how the system operated in different scenarios, mathematical models were made, and Matlab/Simulink modeling was used. The performance parameters measurements are the speed and torque tracking response, armature current, and the output voltage from the Cuk converter with their total harmonic distortions (THDs). The results showed that SMC performed PI in speed and torque tracking and had fewer fluctuations under all scenarios. The SMC controller had a lower overshoot of 0.05 while PI was 0.75, and a settling time of SMC 0.5 seconds is less than the PI controller's 25 seconds in tracking speed and torque. For output converter voltage and armature current, the THD of the PI controller was 0.2441 and 0.3857, respectively, but the THD of SMC was reduced to 0.0833 and 0.0921. lower THD in SMC leads to smoother waveforms and less electromagnetic interference, resulting in faster responses, fewer overshoots, and improved speed and torque. The SMC with Cuk converter was the best control method for the DC motor drive applications, providing increased performance, efficiency, and decreased system losses.
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